If he'd actually known they'd be bringing the baby with them, he would have had one already in the car, but he hadn't thought that Remy would be back with Tony. Rather, he thought Tony wouldn't let her come back. "We'll probably get impatient eventually, and I like knowing what kind of room I should be designing for the baby." Or babies. Never knew with them.
Tony didn't race the car like he normally would have since the baby was in there, so it took a little longer to get to the house than usual, but when they got there, the other Tony stepped out of the car and walked ahead, "She's upstairs expecting you." Then he turned to Remy, "Guess it's just you and me while they're...getting reacquainted. Couldn't better company than me anyway," he said, flashing a grin.